!
    function(a, b) {
        function c() {
            var b = f.getBoundingClientRect().width;
            b / i > 750 && (b = 750 * i);
            var c = b / 7.5;
            f.style.fontSize = c + "px",
                k.rem = a.rem = c
        }
        var d, e = a.document,
            f = e.documentElement,
            g = e.querySelector('meta[name="viewport"]'),
            h = e.querySelector('meta[name="flexible"]'),
            i = 0,
            j = 0,
            k = b.flexible || (b.flexible = {});
        if (g) {
            console.warn("将根据已有的meta标签来设置缩放比例");
            var l = g.getAttribute("content").match(/initial\-scale=([\d\.]+)/);
            l && (j = parseFloat(l[1]), i = parseInt(1 / j))
        } else if (h) {
            var m = h.getAttribute("content");
            if (m) {
                var n = m.match(/initial\-dpr=([\d\.]+)/),
                    o = m.match(/maximum\-dpr=([\d\.]+)/);
                n && (i = parseFloat(n[1]), j = parseFloat((1 / i).toFixed(2))),
                    o && (i = parseFloat(o[1]), j = parseFloat((1 / i).toFixed(2)))
            }
        }
        if (!i && !j) {
            var p = (a.navigator.appVersion.match(/android/gi), a.navigator.appVersion.match(/iphone/gi)),
                q = a.devicePixelRatio;
            i = p ? q >= 3 && (!i || i >= 3) ? 3 : q >= 2 && (!i || i >= 2) ? 2 : 1 : 1,
                j = 1 / i
        }
        if (f.setAttribute("data-dpr", i), !g) if (g = e.createElement("meta"), g.setAttribute("name", "viewport"), g.setAttribute("content", "initial-scale=" + j + ", maximum-scale=" + j + ", minimum-scale=" + j + ", user-scalable=no"), f.firstElementChild) f.firstElementChild.appendChild(g);
        else {
            var r = e.createElement("div");
            r.appendChild(g),
                e.write(r.innerHTML)
        }
        a.addEventListener("resize",
            function() {
                clearTimeout(d),
                    d = setTimeout(c, 300)
            },
            !1),
            a.addEventListener("pageshow",
                function(a) {
                    a.persisted && (clearTimeout(d), d = setTimeout(c, 300))
                },
                !1),
                "complete" === e.readyState ? e.body.style.fontSize = 12 * i + "px": e.addEventListener("DOMContentLoaded",
            function() {
                e.body.style.fontSize = 12 * i + "px"
            },
            !1),
            c(),
            k.dpr = a.dpr = i,
            k.refreshRem = c,
            k.rem2px = function(a) {
                var b = parseFloat(a) * this.rem;
                return "string" == typeof a && a.match(/rem$/) && (b += "px"),
                    b
            },
            k.px2rem = function(a) {
                var b = parseFloat(a) / this.rem;
                return "string" == typeof a && a.match(/px$/) && (b += "rem"),
                    b
            }
    } (window, window.lib || (window.lib = {}));